Attiny Over Serial Configuration

Overview

RPICT board using Attiny microcontroller can be configured over serial using a utility written in python.

Current version allows changes of

• Output format (csv or Emoncms)
• Nodeid (emoncms only)
• Polling (polling interval of data)
• Ical (current calibration value)
• Vcal (Voltage calibration value
• Vest (estimated voltage for power estimate)

RPICT Configuration tool

The configuration tool can be downloaded directly from the raspberrypi:

$ wget lechacal.com/RPICT/lcl-rpict-config.py.zip
$ unzip lcl-rpict-config.py.zip

Reading current configuration

Using the configurator without option only read the configuration stored in the board.

$ ./lcl-rpict-config.py

This yields

# RPICT Configuration Utility
# Read only
# Now reset RPICT hardware

Once the board has received the reset the configuration will be shown.

# 
# Configuration in memory:
# 
# Structure: 0xa0
# Format: 0
# NodeId: 11
# Polling: 5000
# ICAL: 83.330002
# VCAL: 560.000000
# VEST: 240.000000
#

Modify the configuration

To change the values the configurator must be fed with a file containing the new values. We will use the example of a RPICT3T1. Such file look as below.

[main]
format = 0
nodeid = 11
polling = 5000
ical = 83.33
vcal = 560.0
vest = 240.0

We save this file in rpict3t1.conf. Then we can now start the configurator with the -w option.

$ ./lcl-rpict-config.py -w rpict3t1.conf

Once reset the configurator will read the old config then write the new config and display the newly stored one again.

# RPICT Configuration Utility
# Configuration will be overwritten (Ctrl C to cancel)
# Now reset RPICT hardware
# 
# Configuration in memory:
# 
# Structure: 0xa0
# Format: 0
# NodeId: 11
# Polling: 5000
# ICAL: 83.330002
# VCAL: 560.000000
# VEST: 240.000000
# 
# Writing configuration with file rpict3t1.conf
# 
# Configuration in memory:
# 
# Structure: 0xa0
# Format: 1
# NodeId: 11
# Polling: 5000
# ICAL: 83.330002
# VCAL: 560.000000
# VEST: 240.000000
#